swaitsandClaude Opus 4.6
3102fc747a
Implement full SSD1306 OLED display support: - Splash screen on boot (1.5s) with project name, version, board - Dashboard showing radio state, config, counters, RSSI/SNR - RSSI history sparkline (64-sample ring buffer, 2px-wide bars) - DisplayOn/DisplayOff host commands routed via dedicated channel - Pure render functions against generic DrawTarget (no hardware coupling) - Display on/off control bypasses radio task entirely Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
40 lines
1.0 KiB
Markdown
40 lines
1.0 KiB
Markdown
# Crunchy
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The crunchy unroller - deterministically unroll constant loops. For number
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"crunching".
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The Rust optimizer will unroll constant loops that don't use the loop variable,
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like this:
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```rust
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for _ in 0..100 {
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println!("Hello!");
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}
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```
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However, using the loop variable will cause it to never unroll the loop. This is
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unfortunate because it means that you can't constant-fold the loop variable, and
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if you end up stomping on the registers it will have to do a load for each
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iteration. This crate ensures that your code is unrolled and const-folded. It
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only works on literals, unfortunately, but there's a work-around:
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```rust
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debug_assert_eq!(MY_CONSTANT, 100);
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unroll! {
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for i in 0..100 {
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println!("Iteration {}", i);
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}
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}
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```
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This means that your tests will catch if you redefine the constant.
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To default maximum number of loops to unroll is `128`, but that can be easily decreased or increased using the cargo features:
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* `limit_64`
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* `limit_128`
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* `limit_256`
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* `limit_512`
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* `limit_1024`
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* `limit_2048`
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